18036813744805 has 8 divisors (see below), whose sum is σ = 21858475271544. Its totient is φ = 14286585144000.

The previous prime is 18036813744799. The next prime is 18036813744853. The reversal of 18036813744805 is 50844731863081.

It can be written as a sum of positive squares in 4 ways, for example, as 3331475504289 + 14705338240516 = 1825233^2 + 3834754^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 18036813744805 - 2³ = 18036813744797 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 18036813744805.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17858230926 + ... + 17858231935.

It is an arithmetic number, because the mean of its divisors is an integer number (2732309408943).

Almost surely, 2^{18036813744805} is an apocalyptic number.

It is an amenable number.

18036813744805 is a deficient number, since it is larger than the sum of its proper divisors (3821661526739).

18036813744805 is a wasteful number, since it uses less digits than its factorization.

18036813744805 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35716462967.

The product of its (nonzero) digits is 15482880, while the sum is 58.

The spelling of 18036813744805 in words is "eighteen trillion, thirty-six billion, eight hundred thirteen million, seven hundred forty-four thousand, eight hundred five".